Pulley.



" J. T. VOIGT.

PULLEY.

APPLICATION iILnD JAN.13, 1909.

Patefited Aug. 31, 1909.

IN VEN TOR.

WITNESSES:

I AM 6 ATTORNEY.

UNITED STATES PATENT OFFICE.

JOHN T. VOIGT, 0F SEATTLE, WASHINGTON.

PULLEY.

To all whom it may concern:

Be it known that I. Jonx T. VoIG'r, a citizen of the United States,residing at Seattle, in the county of King and State of ashiugton, haveinvented certain new and useful IIUPEOYQIDQHTS in Pulleys, of which thefollowing a soecification.

The object of this invention is the improvement in the construction ofwood split pulleys.

The invention primarily consists in the constriu-tion of :1 two partpulley which is comprised of a rim portion connected by a plurality ofspokes with pairs of transverse bars which are adapted to be clampedupon a shaft.

The invention further consists in the provision of complementarymetallic hub members of novel construction which are arranged forengaging said bars and also to be secured with the shaft and withoutsubjecting the pulley to any strains which would be liable to distortthe same out of shape.

The invention still further consists in the novel construction andarrangement of various features or details of the invention, as will behereinafter described and claimed.

in the accompanying drawings, Figure 1 is an end view of a pulleyembodying my invention and shown with a portion of the rim broken away.Fig. is a cross sectional view of the same. Fig. 3 is a fragmentaryperspective view of the pulley. Fig. 4t is a perspective of one of thehub members.

The reference numeral 5 designates the wheel spokes which are of asubstantially sector shape and extend radially from within proximity ofthe pulley-shaft (t to the peripheral face 7 of the pulley. The widthsof the outer ends of these spokes, as best seen at the right of Fig. 1,are such as to allow a space 8 between the adjacent spokes. Secured tothe spokes and to each other, as by gluing and nailing, are a pluralityof seginents 9 of wood to constitute the pulley rim or, in thisinstance, the rim flanges 10. In constructing the pulley the rain ofsaid segments is made to extend as near as may be circiunferentially ofthe pulley while the grain of the several spokes is disposed radially.From such a disposition of the grain of the aforesaid parts thetransverse swelling of the same when subject to dampness will have aninconsiderable effect to distort the pulley for, as is evident, thespaces 8 intermediate the spokes afford room for the ex- Specificationof Letters Patent.-

Application filed January 13, 1909.

iripheries of the rim flanges. arranged in pairs upon opposite sides ofthe pulley and centrally they are formed with concavities to fit theshaft or upon interposed bushings, which are not shown in the Serial No.472,095.

pansion of the latter, while the grain of the run flanges will expandequally in radial directions.

The pulley is divided upon a plane A-A extending diametrically throughthe shaft Secured by gluing and nailing to the inner ends of the spokesand parallel to said plane are bars 11 of a length to extend to within ashort distance of the inner pe- These bars are drawings.

Ad acent of the shaft are bolts 12 extendf. ing through the opposing ofsaid bars to connect the latter upon the shaft, or bushings; .while nearthe ends of the bars bolts 13 are employed for coupling the pairs ofbars with each other and thereby retain the pulley parts together at therim flanges. It is notv intended thatthe bolts 12 should serve to securethe pulley to the shaft to prevent its slipping thereon; to accomplishthis function I employ hub members which are iclainped to the shaft andarranged to rotatably engage the pulley bars 11. More specifically,these hub members are each comprised of a. metallic body 15 having inits inner face 16 a cavity 17 which. is fitted to 1 the shaft but ofless depth than the semidiameter of the latter so that when two of thesemembers are coupled, as shown in Figs. 1 and 3, the inner faces of thesame will not contact with each other. In proximity of and at oppositesides of the cavity the body is provided with apertures 18 for thereception of the bolts 19 which clamp the members to the shaft.Projecting longitudinally from the end of each said body is :1 lug 20whose office is to extend into the space between the bars 11 in order toencounter one or the other of the same to rotate the pulley with therevolving of the lug.

With the larger sizes of pulleys it is oftentimes desirable topositively secure the hub members to the aforesaid pulley bars. Forwhich purpose an apertured lug 21 is provided for each member and isarranged to overlie the adjacent bar and positioned so that. theaperture of the lug will accommodate one of the bolts 12. The manner ofassembling and connecting the various parts of the pulley and the hubtherefor is clearly illustrated and, it is thought, will be under-Patented Aug. 31, 1909.

stood without further explanation. It may be pointed out, however, thatthe provision of spaces between the pulley spokes allows the air to passthrough the rim to beneath the belt and the minimizing of useless workor undue clinging of the belt to the pulley.

What I claim, is

1. in combination with a shaft, a split pulley provided with barsarranged to be seated upon said shaft and also in spaced relation witheach other, said pulley being provided with two hubmembers which arefitted to the shaft, and means for connecting said hub members togetherand clam wing the same to said shaft.

A wood split pulley comprised of two rim sections, of a semi-circularshape, a bar for each of said sections, a plurality of spokes connectingthe rim sections with the respective bars and spaced to provide airspaces which extend through said rim sections, and bolts for couplingthe bars-and also the two rim sections together.

3. A wood split pulley provided with a rim, spokes extending through therim and affording openings through the latter and intermediate theadjacent spokes, and bars connecting the spokes ot the respective halvesof the pulley.

t. A wood split pulley comprised of a rim which is separable upondiametrically opposite sides, bars, spokes rigidly connected with therim and bars and spaced apart at their outer ends to afford air spacesintermediate the spokes, means for securing the said bars with eachother, and means for securing the pulley to a shaft.

A wood split pulley comprised of a rim which is separable upondiametrically opposite sides, bars, spokes rigidly connected with boththe rim and the bars and spaced apart 1 at their outer ends to attordair spaces intermediate the spokes, means t'or securing the said barswith each other, means for secur ing the pulley to a shaft, said lastnamed means comprising two members which aresever; lly provided withlugs adapted to be inserted between said bars, and bolts "for securingsaid last named members together.

6. in a wood split-pulley, a metal hub comprised of two members, eachmember b..-

ing provided with a lug adapted to be inserted between the sections of asplit pulley and ar 'anged to be upon opposite sides of the hub axis.

7. In a wood split pulley, the combination of the rim formed of aplurality of segments, the spokes extending through said rim andatlording in the latter spaces between the adjacent spokes, pairs oibars which are spaced apart and secured to said spokes, and bolts torsecuring said pairs oi bars with each. other.

8. in a wood split pulley, the combination with the rim formed of aplurality of seg ments, the spokes extending through said rim and a'tlording in the latter spaces between the adjacent spokes, pairs of barswhich are spaced apart and secured to said spokes, bolts for securingsaid pairs of bars with each other, of a shaft, a hub formed of twomembers, said members being each comprised of a body having a lugarranged to extend into the space intermediate said bars, another lugupon each body and apertured to receive one of said bolts, and bolts forsecuring the two hub members to the sh at't.

JOHN T. VOIGT.

lVitnesses Horace Buzzers, to. M. LEE.

